WAS Dynamic cache | ESI Processor
Edge Side Includes (ESI) caching
WebSphere Application Server leverages the Edge Side Includes specification to enable caching and assembly of distributed fragments. Edge Side Includes is a simple mark-up language used to define Web page fragments for dynamic assembly of a Web page at the edge of network.
With the Distributed Fragment Caching and Assembly Support, WAS customers can defer page assembly to any ESI-compliant surrogate server, such as Akamai EdgeSuite service. This may result in a significant performance advantage if fragments can be cached and reused at the surrogate.
Detailed information about the ESI specification...
WAS provides distributed fragment caching and assembly support through the Web server plug-in. WAS uses IBM HTTP Server Plug-in to communicate with the HTTP Server. This plug-in has the ability to cache entire pages or fragments.
With dynamic cache service's external cache control, distributed fragment caching, and assembly support, dynamic content can be exported, cached, and assembled at the most optimal location, closer to the user. More important, WAS can maintain control of the external cache through its invalidation support to ensure the freshness of cached content. As WebSphere Commerce is an application based on WAS, WebSphere Commerce customers can make use of the ESI caching feature to create and serve highly dynamic Web pages without jeopardizing page performance and user experiences.
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